Minecraft, but You Get Random Effects

A scoreboard clock ticks down on a purple boss bar. When it hits zero, every living player is independently dealt one of 35 status effects for exactly 20 seconds - 18 that help, 17 that hurt - and the roll is announced in chat, so everyone sees who got Regeneration II and who got Wither. There is no opting out and no pattern to learn. The pack shows only one mercy: Levitation tags you and schedules Slow Falling for one second before it expires, so the sky drops you gently instead of killing you.

Runs on every Java Edition release from 1.21 to 26.3.

How it works

• A dummy scoreboard objective counts ticks inside tick.mcfunction. At 900 ticks - exactly 45 seconds - it fires the roll function and resets itself back to zero.
• Every player is rolled for separately using execute store result score @s bre_roll run random value 1..35, so two players on the same server almost never share a fate.
• A 35-line dispatch function maps the rolled number onto one tiny function per effect, which applies it for 20 seconds, colours the announcement green or red, and plays a matching sound.
• A purple boss bar tracks the clock for the whole cycle, and the final five seconds add an actionbar countdown plus a note-block tick so you get a moment to brace.
• Levitation is the one hazard the pack softens: it tags the player and schedules Slow Falling for one second before the lift expires, turning a lethal drop into a landing.
• Operators can freeze the chaos with /function but_random_effects:pause, restart it with :resume, or strip every objective and boss bar with :uninstall.

Installing it

1. 1.Download the zip below. Do not unzip it — Minecraft reads the zip directly.
2. 2.In Minecraft, click your world, then Edit, then Open World Folder.
3. 3.Drop the zip into the datapacks folder inside that world.
4. 4.Load the world. Run /datapack list to confirm it is enabled.

First time? How to install Minecraft data packs

Written by MineSpecs and released under CC0 — public domain. Use it, change it, ship it in a modpack, no attribution required. Pairs well with our mods, shaders and resource packs.